Microstructural Study of Hydration of C3S in the Presence of Calcium Nitrate Using Scanning Transmission X-Ray Microscopy (STXM)-Reference-Cited by-同舟云学术

Microstructural Study of Hydration of C3S in the Presence of Calcium Nitrate Using Scanning Transmission X-Ray Microscopy (STXM)

Published:2020-04-22 Issue: Volume:2020 Page:1-9
ISSN:1687-4110
Container-title:Journal of Nanomaterials
language:en
Short-container-title:Journal of Nanomaterials

Author:

Li Qinfei¹²³^ORCID,Wang Yang¹,Geng Guoqing⁴,Chen Heng¹³,Hou Pengkun¹³,Cheng Xin¹³^ORCID,Monteiro Paulo J. M.⁵,Huang Shifeng¹³^ORCID,Kim Jae Hong⁶

Affiliation:

1. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan, China

2. State Key Laboratory of Green Building Materials, Beijing, China

3. Department of Materials Science and Engineering, University of Jinan, Jinan, China

4. Paul Scherrer Institute, Villigen, Switzerland

5. Department of Civil and Environment Engineering, University of California, Berkeley, USA

6. Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Republic of Korea

Abstract

Calcium nitrate (CN) is used widely as an effectively inorganic setting accelerator and antifreeze admixture in concrete structures. In this paper, the multiscale investigation of CN on the hydration of C3S was studied by scanning transmission X-ray microscopy (STXM) combined with near-edge X-ray absorption fine structure (NEXAFS), 29Si MAS NMR, calorimetry, scanning electron microscope, and N2 absorption. It was concluded that the calcium silicate hydrate (C-S-H) surrounds the unhydrated C3S at 1-day hydrated C3S in the presence of calcium nitrate, while portlandite is partly in transformation and is formed partly. Based on Ca L3,2-edge NEXAFS spectra for 1-day hydrated C3S particle, calcium nitrate does not change the structure of the asymmetrically 7-fold coordination of calcium in the C-S-H. Calcium nitrate can accelerate the hydration of C3S to some extent and polymerization of the silicate chains within C-S-H considerably at early age, resulting in the increasing specific surface area.

Funder

U.S. Department of Energy

Publisher

Hindawi Limited

Subject

General Materials Science

Link

http://downloads.hindawi.com/journals/jnm/2020/8419130.pdf

Reference29 articles.

1. The influence of calcium nitrate as antifreeze admixture on the compressive strength of concrete exposed to low temperatures

2. Technical calcium nitrate as set accelerator for cement at low temperatures

Cited by 6 articles. 订阅此论文施引文献订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献

1. Carbonation Resistance of Cement-Based Materials Improved by Nitrite;Advances in Materials Science and Engineering;2024-05-06

2. Characterization of hydrated magnesium carbonate materials with synchrotron radiation-based scanning transmission X-ray spectromicroscopy;Materials Advances;2024

3. Effects of urea on carbonation properties and microstructure of cementitious materials;Materials Today Communications;2023-08

4. Prediction of high strength ternary blended concrete containing different silica proportions using machine learning approaches;Results in Engineering;2023-03

5. Low-temperature (−10 °C) curing of Portland cement paste – Synergetic effects of chloride-free antifreeze admixture, C–S–H seeds, and room-temperature pre-curing;Cement and Concrete Composites;2022-01